package day15.pack2;

import day15.Teacher;

public class Test2 {
    public static void main(String[] args) {
        Teacher a = new Teacher();
        a.getId();



    }

//    a() {
//        ...new ..
//        ..new ...
//        ..new ...
//        ..new ...
//        ..new ...
//    }
}
class A {
    B b;
}
class B {
    A a;
}
